Global Positioning System Time Transfer Receiver (GPS/TIR) Prototype Design and Initial Test Evaluation

J. Oake, A. Frank, S. Falvey, M. Lister, J. Buisson

Abstract:	Time transfer equipment and techniques used with the NRL Navigation Technology Satellites have been modified and extended for use with the GPS satellites. A prototype receiver was built and field tested at NASA's Kennedy Spaceflight Center. The receiver uses the GPS TJ1 link at I575 MIk with C/A code only to resolve a measured range to the satellite. A theoretical range is computed from the satellite ephemeris transmitted in the data message and the user's coordinates. Results of user offset from GPS time are obtained by differencing the measured and theoretical ranges and applying calibration corrections. These results may be referenced to Naval Observatory Time through published values of offsets of GPS Time from USNO Master Clock 1. Results of the first field test evaluation of the receiver are presented. Measurements were made at NASA Goddard's MILA facility located in the Kennedy Spaceflight Center, Fla. Portable clock measurements were made for comparison, (and all measurements were referenced to the Naval Observatory.
Published in:	Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1981 Naval Research Laboratory Washington, DC
Pages:	419 - 449
Cite this article:	Oake, J., Frank, A., Falvey, S., Lister, M., Buisson, J., "Global Positioning System Time Transfer Receiver (GPS/TIR) Prototype Design and Initial Test Evaluation," Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1981, pp. 419-449.
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